KR102009910B1 - Gear pump - Google Patents

Gear pump Download PDF

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Publication number
KR102009910B1
KR102009910B1 KR1020180044940A KR20180044940A KR102009910B1 KR 102009910 B1 KR102009910 B1 KR 102009910B1 KR 1020180044940 A KR1020180044940 A KR 1020180044940A KR 20180044940 A KR20180044940 A KR 20180044940A KR 102009910 B1 KR102009910 B1 KR 102009910B1
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KR
South Korea
Prior art keywords
gear
drive
driven
casing
bush
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KR1020180044940A
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Korean (ko)
Inventor
김범열
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김범열
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Priority to KR1020180044940A priority Critical patent/KR102009910B1/en
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Publication of KR102009910B1 publication Critical patent/KR102009910B1/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/082—Details specially related to intermeshing engagement type machines or pumps
    • F04C2/084—Toothed wheels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • F04C15/0057—Driving elements, brakes, couplings, transmission specially adapted for machines or pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
    • F04C18/08—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C18/082—Details specially related to intermeshing engagement type pumps
    • F04C18/084—Toothed wheels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/0042—Driving elements, brakes, couplings, transmissions specially adapted for pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2230/00—Manufacture
    • F04C2230/10—Manufacture by removing material

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)

Abstract

The present invention relates to a gear pump and, more specifically, to a gear pump forming a chamfer in a bush formed at both side portions of a gear of components of the gear pump to reduce a load applied to a drive shaft by pressure distribution of a sucked fluid. Moreover, durability of the gear pump can be extended due to reduction in friction between the bush and the gear by pressure balance and reduction in amounts of current required when the gear rotates. The gear pump comprises: a casing; first and second cover members covering each of both side portions of the casing, and having a suction hole and a discharge hole; a drive shaft installed in the casing; a driven shaft arranged in parallel with the drive shaft in the casing; a drive gear fixed to the drive shaft; a driven gear fixed to the driven shaft to be engaged with the drive gear; and a pair of bushes disposed in both side portions of the drive gear and the driven gear for the drive shaft and the driven shaft to be axially rotated. In addition, the chamfer is formed in an outer diameter portion of the bushes.

Description

기어펌프{Gear pump}Gear Pump

본 발명은 기어펌프에 관한 것으로, 보다 상세하게는 기어펌프의 부품 중 기어의 양측부에 구비된 부시에 모따기를 형성함으로써, 흡입되는 유체의 압력 분산에 의해 구동샤프트에 가해지는 하중을 감소시키고, 압력 평형에 의해 부시와 기어의 마찰 감소 및 기어 회전시 소요되는 전류량의 감소로 인해 기어펌프의 수명을 연장시킬 수 있도록 한 기어펌프에 관한 것이다.The present invention relates to a gear pump, and more particularly, by forming a chamfer in the bush provided on both sides of the gear part of the gear pump, thereby reducing the load applied to the drive shaft by the pressure dispersion of the suctioned fluid, The present invention relates to a gear pump capable of extending the life of the gear pump due to the reduction of friction between the bush and the gear by the pressure balance and the reduction of the amount of current required when the gear rotates.

일반적으로 기어펌프는 케이싱의 내측에 서로 맞물려 있는 구동기어와 종동기어가 구비되고, 이 구동기어가 종동기어를 구동시켜 서로 맞물려 회전을 하면서 펌핑작용이 일어나게 되어 케이싱의 내측면 사이와 부시에 형성된 통로 사이에 생기는 공간을 유체가 이동경로로 삼아 유체를 일방향으로 이송시키는 장치이다.In general, the gear pump is provided with a drive gear and a driven gear that are engaged with each other inside the casing, the drive gear is driven by the driven gear to engage with each other to rotate the pumping action occurs between the inner surface of the casing and the passage formed in the bush It is a device that transfers the fluid in one direction by using the space generated between the fluid as a movement path.

이렇게, 기어펌프(1)는 도 1에 도시된 바와 같이 밀폐된 내부공간을 제공하는 케이싱(10)과, 케이싱(10)의 양측부를 각각 커버하되, 흡입구가 형성된 제1커버부재(12a)와, 송출구가 형성된 제2커버부재(12b)와, 케이싱(12)의 내부에 축회전 가능하게 설치되며 그 일단부가 제2커버부재(12b)의 외측으로 돌출되게 연장된 구동샤프트(14)와, 상기 케이싱(10) 내부에 구동샤프트(14)와 나란하게 배치되는 종동샤프트(16)와, 구동샤프트(14)에 고정되는 구동기어(18)와, 종동샤프트(16)에 고정되어 구동기어(18)에 치합되는 종동기어(20)와, 구동샤프트(14)과 종동샤프트(16)가 축회전 가능하도록 구동기어(18) 및 종동기어(20)의 양측부에 구비되는 제1,2부시(22a)(22b)로 구성되어 있다.As such, the gear pump 1 covers the casing 10 and the both sides of the casing 10 to provide a closed inner space, as shown in FIG. 1, and includes a first cover member 12a having an inlet. A second cover member 12b having a discharge port, a drive shaft 14 installed in the casing 12 so as to be rotatable, and one end thereof protruding outward of the second cover member 12b; The driven shaft 16 is arranged in parallel with the drive shaft 14 in the casing 10, the drive gear 18 fixed to the drive shaft 14, and the drive gear fixed to the driven shaft 16. First and second parts provided on both sides of the drive gear 18 and the driven gear 20 such that the driven gear 20 engaged with the 18 and the drive shaft 14 and the driven shaft 16 can be rotated. It is comprised by the bushes 22a and 22b.

그리고, 상기 제1,2부시(22a)(22b)에는 흡입구를 통하여 흡입된 유체가 송출구로 이동할 수 있도록 통로가 형성된다.In addition, a passage is formed in the first and second bushes 22a and 22b to allow the fluid sucked through the suction port to move to the discharge port.

이와 같이 구동샤프트(14)의 회전에 의해 구동샤프트(14)에 구비된 구동기어(18)와 이 구동기어(18)에 치합된 종동기어(20)의 회전에 의해 펌핑작용이 이루어져 유체가 흡입구를 통하여 흡입되어 송출구를 통해 배출되게 된다. As a result of the rotation of the drive shaft 14, a pumping action is performed by the rotation of the drive gear 18 provided in the drive shaft 14 and the driven gear 20 meshed with the drive gear 18, so that the fluid is inlet. It is sucked through and discharged through the outlet.

이때, 구동기어(14)와 종동기어(20)의 회전에 의해 펌핑작용이 이루어져 유체를 흡입할 때 흡입된 유체의 압력이 분산되지 않고 도 2에 도시된 바와 같이 어느 한 곳에 집중되게 되면서 구동샤프트(14)에 하중이 증가하게 되는 문제점이 있었다.At this time, the pumping action is made by the rotation of the drive gear 14 and the driven gear 20, so that the pressure of the sucked fluid is not dispersed when the fluid is sucked, and the driving shaft is concentrated as shown in FIG. There was a problem that the load increased at (14).

또한, 흡입과 토출되는 유체의 압력에 의해 구동기어(18)가 일측으로 밀리면서 구동기어(18)가 밀린 방향에 위치한 부시와 마찰 저항으로 인해 마모가 발생하여 유체의 누수가 발생하게 되는 문제점이 있었다.In addition, when the driving gear 18 is pushed to one side by the pressure of the suction and discharged fluid, wear occurs due to the frictional resistance between the bush located in the direction in which the driving gear 18 is pushed, and fluid leakage occurs. there was.

그리고, 유체의 흡입과 토출시 압력 발생으로 인해 구동기어(18)와 종동기어(20)의 회전간 마찰로 인하여 소요되는 전류량이 증가하게 되어, 기어펌프(1)의 수명이 단축되는 문제점이 있었다.In addition, the amount of current required due to the friction between the rotation of the drive gear 18 and the driven gear 20 increases due to the pressure generated during the suction and discharge of the fluid, thereby reducing the life of the gear pump 1. .

본 발명은 상기한 종래의 문제점을 해결하기 위하여 안출된 것으로, 부시에 모따기를 형성하되, 구동기어가 위치한 일측부에 모따기를 형성함으로써, 흡입되는 유체의 압력이 분산되게 되어 구동샤프트에 가해지는 하중을 감소시킬 수 있도록 하는데 그 목적이 있다.The present invention has been made in order to solve the above-described conventional problems, by forming a chamfer on the bush, by forming a chamfer on one side where the drive gear is located, the pressure of the fluid to be sucked is dispersed, the load applied to the drive shaft The purpose is to reduce the

그리고, 부시에 모따기를 형성하여 외부로부터 흡입되는 유체의 압력이 부시에 형성된 모따기에 의해 평등하게 분산되면서 균등하게 압력이 형성되어 유량이 증가되도록 하는데 그 목적이 있다.In addition, the chamfer is formed in the bush and the pressure of the fluid sucked from the outside is distributed evenly by the chamfer formed in the bush, the pressure is formed evenly to increase the flow rate.

또한, 흡입되는 유체의 압력이 평등하여 구동샤프트에 발생되는 부하량이 감소되고, 압력 손실이 저하되며, 이로 인하여 기어펌프의 효율성이 증가함과 동시에 유량 증가와 전류량 감소를 이루도록 하는데 그 목적이 있다.In addition, the pressure of the fluid to be sucked is equal to the load generated in the drive shaft is reduced, the pressure loss is lowered, thereby increasing the efficiency of the gear pump and at the same time to increase the flow rate and the current amount.

상기한 목적을 달성하기 위한 본 발명은 케이싱과, 케이싱의 양측부를 각각 커버하되, 흡입구와 송출구가 형성된 제1,2커버부재와, 케이싱의 내부에 축설되는 구동샤프트와, 상기 케이싱 내부에 구동샤프트와 나란하게 배치되는 종동샤프트와, 구동샤프트에 고정되는 구동기어와, 종동샤프트에 고정되어 구동기어에 치합되는 종동기어와, 구동샤프트과 종동샤프트가 축회전 하도록 구동기어 및 종동기어의 양측부에 구비되는 한 쌍의 부시로 구성된 기어펌프에 있어서, 상기 부시의 외경부에는 모따기가 형성된 것을 특징으로 한다.The present invention for achieving the above object is to cover the casing, both sides of the casing, respectively, the first and second cover members formed with the suction port and the discharge port, the drive shaft is built in the casing, the drive inside the casing Driven shafts arranged in parallel with the shaft, driven gears fixed to the drive shafts, driven gears fixed to the driven shafts and engaged with the drive gears, and on both sides of the drive gears and driven gears so that the drive shafts and driven shafts rotate. In the gear pump consisting of a pair of bushes provided, the outer diameter portion of the bush is characterized in that the chamfer is formed.

여기서, 상기 모따기는 구동기어에 대응되는 부시의 외경부에 형성된 것을 특징으로 한다.Here, the chamfer is characterized in that formed in the outer diameter portion of the bush corresponding to the drive gear.

나아가, 상기 모따기는 부시에 형성된 통로를 제외한 외경부에 형성된 것을 특징으로 한다.Further, the chamfer is characterized in that formed on the outer diameter portion except for the passage formed in the bush.

아울러, 상기 부시에 형성된 모따기의 각은 152.5°±2.5°인 것을 특징으로 한다.In addition, the angle of the chamfer formed in the bush is characterized in that 152.5 ° ± 2.5 °.

이와 같이 구성된 본 발명은 부시에 모따기를 형성하되, 구동기어가 위치한 일측부에 모따기를 형성함으로써, 흡입되는 유체의 압력이 분산되게 되어 구동샤프트에 가해지는 하중을 감소시킬 수 있도록 하는 효과가 있다.The present invention configured as described above forms an chamfer on the bush, but by forming the chamfer on one side where the drive gear is located, the pressure of the fluid to be sucked is dispersed to reduce the load on the drive shaft.

그리고, 부시에 모따기를 형성하여 외부로부터 흡입되는 유체의 압력이 부시에 형성된 모따기에 의해 평등하게 분산되면서 균등하게 압력이 형성되어 유량이 증가되도록 하는 효과가 있다.And, by forming a chamfer in the bush and the pressure of the fluid sucked from the outside is distributed evenly by the chamfer formed in the bush has an effect that the pressure is formed evenly to increase the flow rate.

또한, 흡입되는 유체의 압력이 평등하여 구동샤프트에 발생되는 부하량이 감소되고, 압력 손실이 저하되며, 이로 인하여 기어펌프의 효율성이 증가함과 동시에 유량 증가와 전류량 감소를 이루도록 하는 효과가 있다.In addition, the pressure of the fluid to be sucked is equal to the load generated in the drive shaft is reduced, the pressure loss is reduced, thereby increasing the efficiency of the gear pump and at the same time has the effect of increasing the flow rate and decrease the amount of current.

도 1은 종래의 기어펌프를 보인 도면.
도 2는 종래의 기어 및 부시에 작용하는 압력상태를 보인 도면.
도 3은 본 발명에 따른 기어펌프를 보인 정단면도.
도 4는 본 발명에 따른 기어펌프를 보인 측단면도.
도 5a 및 도 5b는 본 발명의 부시를 보인 도면.
도 6a 및 도 6b는 본 발명에 따른 기어펌프의 작용관계를 보인 것으로, 기어와 부시에 작용하는 압력상태를 보인 도면.1 is a view showing a conventional gear pump.
2 is a view showing a pressure state acting on the conventional gear and bush.
Figure 3 is a front sectional view showing a gear pump according to the present invention.
Figure 4 is a side sectional view showing a gear pump according to the present invention.
5A and 5B show a bush of the present invention.
6a and 6b is a view showing the working relationship of the gear pump according to the present invention, a view showing a pressure state acting on the gear and the bush.

이하, 본 발명에 따른 기어펌프에 대하여 첨부된 도면을 참조하여 상세히 설명하면 다음과 같다.Hereinafter, the gear pump according to the present invention will be described in detail with reference to the accompanying drawings.

도 3은 본 발명에 따른 기어펌프를 보인 정단면도이고, 도 4는 본 발명에 따른 기어펌프를 보인 측단면도이고, 도 5a 및 도 5b는 본 발명의 부시를 보인 도면이다.Figure 3 is a front sectional view showing a gear pump according to the present invention, Figure 4 is a side sectional view showing a gear pump according to the present invention, Figures 5a and 5b is a view showing a bush of the present invention.

도 3 내지 도 5b에 도시된 바와 같이 본 발명에 따른 기어펌프(100)는 내부에 설치공간을 제공하는 케이싱(110)이 구비된다.3 to 5b, the gear pump 100 according to the present invention is provided with a casing 110 for providing an installation space therein.

여기서, 상기 케이싱(110)의 양측부를 각각 커버하는 제1,2커버부재(112)(114)가 구비되되, 제1커버부재(112)에는 유체가 흡입되는 흡입구가 형성되고, 제2커버부재(114)에는 유체가 배출되는 송출구가 형성된다.Here, the first and second cover members 112 and 114 are provided to cover both sides of the casing 110, respectively, and the first cover member 112 is formed with a suction port through which fluid is sucked, and the second cover member. The outlet 114 through which the fluid is discharged is formed at 114.

나아가, 상기 케이싱(110)의 내부에 축회전 가능하게 설치되고, 그 일단부가 제2커버부재(114)의 외측으로 돌출되게 연장된 구동샤프트(120)가 구비되며, 케이싱(110) 내부에 구동샤프트(120)와 나란하게 배치되는 종동샤프트(122)가 구비된다.Furthermore, a drive shaft 120 is installed in the casing 110 so as to be rotatable, and one end thereof protrudes outward of the second cover member 114, and is driven in the casing 110. A driven shaft 122 is provided which is arranged in parallel with the shaft 120.

이때, 상기 구동샤프트(120)에 고정되는 구동기어(124)가 구비되고, 종동샤프트(122)에 고정되어 구동기어(124)에 치합되는 종동기어(126)가 구비된다.At this time, a drive gear 124 fixed to the drive shaft 120 is provided, and a driven gear 126 fixed to the driven shaft 122 and engaged with the drive gear 124 is provided.

아울러, 상기 구동샤프트(120)와 종동샤프트(122)가 축회전 가능하도록 구동기어(124) 및 종동기어(126)의 양측부에 각각 구비되는 한 쌍의 부시(130)가 구비된다.In addition, a pair of bushes 130 are provided at both sides of the drive gear 124 and the driven gear 126 so that the drive shaft 120 and the driven shaft 122 can be axially rotated.

이때, 상기 한 쌍의 부시(130)에는 흡입구를 통하여 흡입된 유체가 송출구로 이동할 수 있도록 통로(132)가 형성된다.At this time, the pair of bush 130 is formed with a passage 132 so that the fluid sucked through the inlet can move to the outlet.

한편, 상기 기어펌프(100)는 통상의 기술로써, 여기에서는 기어펌프(100)에 대한 구체적인 구성 설명은 생략한다.On the other hand, the gear pump 100 is a conventional technique, the detailed description of the configuration of the gear pump 100 will be omitted here.

그리고, 상기 구동기어(124) 및 종동기어(126)의 양측부에 구비된 한 쌍의 부시(130)에는 외측 각 모서리부에 모따기(134)가 형성된다.In addition, the pair of bushes 130 provided at both side portions of the driving gear 124 and the driven gear 126 are formed with chamfers 134 at the outer corners thereof.

여기서, 상기 부시(130)에 형성되는 모따기(134)는 구동기어(124)와 종동기어(126)가 설치된 방향의 외경부에 형성된다.Here, the chamfer 134 formed in the bush 130 is formed in the outer diameter portion of the direction in which the drive gear 124 and the driven gear 126 is installed.

나아가, 상기 부시(130)에 형성된 모따기(134)는 부시(130)에 형성되어 유체가 이동하는 통로(132)를 제외한 외경부에 형성된다.Further, the chamfer 134 formed in the bush 130 is formed in the bush 130 is formed in the outer diameter portion excluding the passage 132 through which the fluid moves.

아울러, 상기 부시(130)의 외경에 형성되는 모따기(134)의 각은 152.5°±2.5°로 형성된다.In addition, the angle of the chamfer 134 formed in the outer diameter of the bush 130 is formed to 152.5 ° ± 2.5 °.

이와 같이 구성된 본 발명에 따른 기어펌프에 대한 작용관계를 설명하면 다음과 같다.Referring to the operational relationship for the gear pump according to the present invention configured as described above are as follows.

도 6a 및 도 6b는 본 발명에 따른 기어펌프의 작용관계를 보인 것으로, 기어와 부시에 작용하는 압력상태를 보인 도면이다.6a and 6b show the working relationship of the gear pump according to the present invention, it is a view showing a pressure state acting on the gear and the bush.

이에 도시된 바와 같이 본 발명에 따른 기어펌프(100)는 구동샤프트(120)의 회전에 의해 구동기어(124)와 종동기어(126)의 회전으로 펌핑작용이 이루어지고, 이 펌핑작용에 의해 제1커버부재(112)에 형성된 흡입구를 통하여 유체가 흡입되고, 흡입된 유체는 한 쌍의 부시(130)에 형성된 통로(132)를 통하여 이동하면서 제2커버부재(114)에 형성된 송출구를 통하여 외부로 배출되게 된다.As shown therein, the gear pump 100 according to the present invention is pumped by the rotation of the drive gear 124 and the driven gear 126 by the rotation of the drive shaft 120, by the pumping action The fluid is sucked through the inlet formed in the first cover member 112, and the sucked fluid moves through the passage 132 formed in the pair of bushes 130, through the outlet formed in the second cover member 114. It will be discharged to the outside.

이와 같이 상기 구동기어(124)와 종동기어(126)의 회전으로 인해 발생되는 펌핑작용에 의해 유체가 흡입되고, 흡입되는 유체는 도 6b에 도시된 바와 같이 송출구 압력 형성이 부시(130)의 모따기(134)에서 분산되어 구동샤프트(120)에 가해지는 하중부담을 감소시키게 된다.Thus, the fluid is sucked by the pumping action generated by the rotation of the drive gear 124 and the driven gear 126, the suction fluid is formed in the outlet pressure of the bush 130 as shown in Figure 6b Dispersion in the chamfer 134 reduces the load on the drive shaft 120.

따라서, 상기 구동기어(124)와 종동기어(126)의 회전에 의해 흡입되는 유체의 압력평형에 의해 부시(130)와 구동기어(124) 및 종동기어(126)의 마찰력을 감소시켜 구동기어(124)와 종동기어(126)가 서로 맞물려 회전할 때 소요되는 전류량을 감소시키고, 기어펌프(100)의 수명을 연장시킬 수 있게 된다.Accordingly, the friction force between the bush 130, the drive gear 124 and the driven gear 126 is reduced by the pressure balance of the fluid sucked by the rotation of the drive gear 124 and the driven gear 126, thereby reducing the friction between the drive gear ( 124 and the driven gear 126 are engaged with each other to reduce the amount of current required to rotate, it is possible to extend the life of the gear pump (100).

또한, 상기 부시(130)에 형성된 모따기(134)의 각도를 152.5°±2.5°로 형성하여 펌핑시 균일하게 형성되는 압력에 의해 유량이 증가하게 되고, 모따기(134)에 의해 압력이 평등하게 분포되어 부하량을 감소시키게 되며, 압력 손실의 저하시킬 수 있게 되고, 기어펌프(100)의 효율성이 향상되게 된다.In addition, by forming the angle of the chamfer 134 formed in the bush 130 to 152.5 ° ± 2.5 ° to increase the flow rate by the pressure uniformly formed during pumping, pressure is distributed evenly by the chamfer 134 It is possible to reduce the load, it is possible to reduce the pressure loss, the efficiency of the gear pump 100 is improved.

하기의 표 1 내지 표 7은 종래의 기어펌프에 설치되는 부시와 본 발명의 부시에 대한 모따기 값과, 부하량 및 유량 변화를 보인 것으로, 시험펌프 0.75cc/rev(C.C.W), 시험유 ISO VG 68, 사용 유온 20~30℃, 모터사양(AC모터) 60Hz 1610rpm/220V 1.07A의 시험 조건으로 실험한 결과이다.Tables 1 to 7 below show chamfering values, loads, and flow rate changes for bushes installed in a conventional gear pump and bushes of the present invention, test pump 0.75 cc / rev (CCW), test oil ISO VG 68 It is the result of experiment under the test condition of 20 ~ 30 ℃ of oil temperature, AC specification of 60Hz, 1610rpm / 220V 1.07A.

1) 모따기 값 비교 확인 결과 (1610rpm, 210kg/, 230V 기준)1) Comparison result of chamfer value (1610rpm, 210kg /, 230V standard)

[표 1]TABLE 1

Figure 112018038422305-pat00001
Figure 112018038422305-pat00001

표 1에 도시된 바와 같이, 부하량 및 유량 최적화를 위하여 모따기(134)는 1.5C로 형성하고, 부시(130)에 형성된 모따기(134)는 152.5°±2.5°로 형성하는 것이 최적의 효과를 구현할 수 있는 것을 알 수 있다.As shown in Table 1, the chamfer 134 is formed to 1.5C, and the chamfer 134 formed in the bush 130 to 152.5 ° ± 2.5 ° to achieve the optimum effect for the load and flow optimization I can see.

2) 압력변화에 따른 부하량 변화 결과2) Load change result by pressure change

종래의 기술Conventional technology

[표 2]TABLE 2

Figure 112018038422305-pat00002
Figure 112018038422305-pat00002

본 발명의 기술Technique of the Invention

[표 3]TABLE 3

Figure 112018038422305-pat00003
Figure 112018038422305-pat00003

본 발명의 감소폭Reduction of the Invention

[표 4]TABLE 4

Figure 112018038422305-pat00004
Figure 112018038422305-pat00004

표 2 내지 표 4에서와 같이, 부시에 모따기를 형성함으로써, 종래의 부시와 비교하여 본 발명이 압력평형에 의해 구동기어의 마찰력 및 전류량이 감소된 것을 알 수 있다. As shown in Table 2 to Table 4, by forming the chamfer in the bush, it can be seen that the present invention compared with the conventional bush, the frictional force and the amount of current of the drive gear is reduced by the pressure balance.

3)회전수 변화에 따른 유량 변화 결과3) Flow rate change result by change of rotation

종래의 기술  Conventional technology

[표 5]TABLE 5

Figure 112018038422305-pat00005
Figure 112018038422305-pat00005

본 발명의 기술 Technique of the Invention

[표 6]TABLE 6

Figure 112018038422305-pat00006
Figure 112018038422305-pat00006

본 발명의 감소폭 Reduction of the Invention

[표 7]TABLE 7

Figure 112018038422305-pat00007
Figure 112018038422305-pat00007

표 5 내지 표 7에 도시된 바와 같이, 기어펌프의 효율성 및 유량이 증가한 것을 알 수 있다.As shown in Tables 5 to 7, it can be seen that the efficiency and flow rate of the gear pump increased.

상기에서는 본 발명에 따른 기어펌프에 대한 바람직한 실시예에 대하여 설명하였지만, 본 발명은 이에 한정되는 것이 아니고, 특허청구범위와 발명의 상세한 설명 및 첨부한 도면의 범위 안에서 여러 가지로 변형하여 실시하는 것이 가능하고, 이 또한 본 발명의 권리범위에 속한다.In the above, a preferred embodiment of the gear pump according to the present invention has been described, but the present invention is not limited thereto, and the present invention is not limited thereto, and various modifications can be made within the scope of the claims and the detailed description of the invention and the accompanying drawings. It is possible and this also belongs to the scope of the present invention.

100 : 기어펌프 110 : 케이싱
112, 114 : 제1,2커버부재 120 : 구동샤프트
122 : 종동샤프트 124 : 구동기어
126 : 종동기어 130 : 부시
132 : 통로 134 : 모따기100: gear pump 110: casing
112 and 114: first and second cover members 120: drive shaft
122: driven shaft 124: drive gear
126: driven gear 130: bush
132 passageway 134 chamfer

Claims (4)

케이싱과, 케이싱의 양측부를 각각 커버하되, 흡입구와 송출구가 형성된 제1,2커버부재와, 케이싱의 내부에 축설되는 구동샤프트와, 상기 케이싱 내부에 구동샤프트와 나란하게 배치되는 종동샤프트와, 구동샤프트에 고정되는 구동기어와, 종동샤프트에 고정되어 구동기어에 치합되는 종동기어와, 구동샤프트과 종동샤프트가 축회전 하도록 구동기어 및 종동기어의 양측부에 구비되는 한 쌍의 부시로 구성된 기어펌프에 있어서,
상기 한 쌍의 부시에는 흡입구를 통하여 흡입된 유체가 송출구로 이동할 수 있도록 통로가 형성되고,
상기 한 쌍의 부시에는 구동기어와 종동기어가 설치된 방향의 외경부에 펌핑작동시 유체의 압력을 분산시킬 수 있도록 하는 모따기가 형성되되,
상기 모따기는 부시의 통로를 제외한 부분에 152.5°±2.5°의 각도 범위를 갖도록 하여 1.5C로 형성된 것을 특징으로 하는 기어펌프.
A first and second cover members each having a casing and both sides of the casing, the inlet and the outlet being formed, a drive shaft built in the casing, and a driven shaft disposed in parallel with the drive shaft in the casing; A gear pump comprising a drive gear fixed to the drive shaft, a driven gear fixed to the driven shaft and engaged with the drive gear, and a pair of bushes provided on both sides of the drive gear and the driven gear so that the drive shaft and the driven shaft rotate. To
The pair of bush is formed with a passage so that the fluid sucked through the suction port can move to the discharge port,
The pair of bushes are formed with a chamfer to disperse the pressure of the fluid during the pumping operation in the outer diameter portion of the drive gear and the driven gear is installed,
The chamfering gear pump, characterized in that formed in 1.5C to have an angular range of 152.5 ° ± 2.5 ° in the portion excluding the passage of the bush.
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102659308B1 (en) 2022-11-09 2024-04-22 (주)동일산업 High pressure gear pump for low viscosity

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20030049421A (en) * 2001-12-15 2003-06-25 현대자동차주식회사 Oil pump
KR20030055035A (en) * 2001-12-26 2003-07-02 엘지전자 주식회사 Device for reducing frictional loss of scroll compressor
KR20060051415A (en) * 2004-09-16 2006-05-19 에어 프로덕츠 앤드 케미칼스, 인코오포레이티드 Method and apparatus for machining workpieces having interruptions
KR20110084699A (en) * 2010-01-18 2011-07-26 황종원 Gear pump

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20030049421A (en) * 2001-12-15 2003-06-25 현대자동차주식회사 Oil pump
KR20030055035A (en) * 2001-12-26 2003-07-02 엘지전자 주식회사 Device for reducing frictional loss of scroll compressor
KR20060051415A (en) * 2004-09-16 2006-05-19 에어 프로덕츠 앤드 케미칼스, 인코오포레이티드 Method and apparatus for machining workpieces having interruptions
KR20110084699A (en) * 2010-01-18 2011-07-26 황종원 Gear pump

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102659308B1 (en) 2022-11-09 2024-04-22 (주)동일산업 High pressure gear pump for low viscosity

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